The ro/ro forest-products carrier Arcturus <see Abs. No. 58522, Dec. 1982, & 59265, Apr. 1983> was followed in Dec. 1982 by Finnmerchant, a ship of the same design from the same builders, Rauma-Repola. These single-screw ships have a hull designed for two deadweight conditions 8000 dwt <at 18.5 knots> and 13,000 dwt <at 15 knots, using only one of the ship's two engines>. The design requirements included good manoeuvrability <especially in ports>, fuel economy and low vibration level. The development of this hull design is described; its features include a pronounced stern bulb. Reasons are given for selecting a single screw rather than twin screws and a brief account is given of model tests, including hull-pressure fluctuation measurements, and <on Arcturus> full-scale vibration and hull-pressure fluctuation measurements. During trials, photographs were taken <through observation windows> of the propeller <which has moderate skew> and further photographs have since been taken under various loading conditions. Trim optimisation is discussed. It is mentioned that several pressure transducers are installed in the forebodt, and should give information on ice pressures against the shell plating <the ships are used in the UK-Holland-Finland trade>. Following the main article is a brief description of a computer-based total control alarm and automation system, developed by Rauma-Repola and designated "Shipa", which consists of a number of microprocessor substations and is to be installed in a third 8000/13,000-dwt ship of this series, now building at the same yard.

  • Supplemental Notes:
    • Motor Ship, 63 <1983>, p.68 <Jan.> (2 pp., 3 tab., 1 graph, 1 diag., 1 phot.)
  • Publication Date: 1983


  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00685016
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM